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3,538 results for “Lizard”
Data from: dispersal restriction and facilitation in species with differing tolerance to development: a landscape genetics study of native and introduced lizards
<p><em>Aim</em>: The development of natural habitats into urban land uses has greatly accelerated in the recent past due to human activities. This habitat development disrupts species' natural dispersal processes and can lead to both direct and indirect impacts on dispersal. Whether human activities result in restricted or facilitated dispersal may depend on a species' development tolerance; however, this premise has not been tested. We examined the impact of urbanization and road networks on the dispersal of three lizard species in the context of their development tolerance.</p> <p><em>Location</em>: Curaçao</p> <p><em>Methods</em>: To quantify species' development tolerance, we modelled three lizard species abundances at sites based on surrounding landscape development. Using microsatellite genotypes, we conducted individual-based resistance surface analyses and modelled the effect of habitat development on genetic admixture to assess indirect dispersal restriction and facilitation. We explored direct facilitation of dispersal using network analysis of mitochondrial haplotypes.</p> <p><em>Results</em>: <em>Phyllodactylus martini</em>, a native gecko species, was the least tolerant of development and experienced indirect dispersal restriction due to roads, according to resistance surface analyses. <em>Anolis lineatus, </em>a native anole species, exhibited a neutral relationship with development. Resistance surfaces and Structure analyses showed that <em>A. lineatus</em> faced indirect dispersal restrictions from roads and developed areas, while mitochondrial haplotype networks suggested they benefited from occasional human-facilitated long-distance dispersal events. <em>Hemidactylus mabouia</em>, an introduced gecko species, was the most tolerant of development, and experienced no dispersal restriction, but mitochondrial haplotypes suggest direct long-distance dispersal facilitation.</p> <p><em>Main conclusions</em>:<em> </em>Our findings highlight development tolerance as a key predictor of dispersal impact for these species and future work should test whether these patterns are upheld in other systems. Understanding how human activities affect species' dispersal will aid in managing introduced species while promoting connectivity for native species navigating dispersal challenges in dynamic landscapes.</p>
Fig. 1 in A new species of Andean lizard Proctoporus (Squamata: Gymnophthalmidae) from montane forest of the Historic Sanctuary of Machu Picchu, Peru
Fig. 1. Holotype of Proctoporus machupicchu (MHNC 13362; SVL 41.2 mm).
Fig. 2 in Thermal ecology of the Pygmy Alligator Lizard, Gerrhonotus parvus Knight and Scudday, 1985 (Squamata: Anguidae), in Nuevo Léon, Mexico
Fig. 2. Seasonal pattern of daily activity of Gerrhonotus parvus in Sierra Madre Oriental.
Fig. 3 in Thermal ecology of the Pygmy Alligator Lizard, Gerrhonotus parvus Knight and Scudday, 1985 (Squamata: Anguidae), in Nuevo Léon, Mexico
Fig. 3. Proportions of microhabitats used by Gerrhonotus parvus.
Fig. 2 in Two new species of gymnophthalmid lizards of the genus Petracola (Squamata: Cercosaurinae) from the Andes of northeastern Peru, and their phylogenetic relationships
Fig. 2. Holotype of Petracola amazonensis, female MUBI 11485 (SVL = 43.0 mm, TL = 42.3 mm).
Fig. 3 in A new lizard of the Liolaemus montanus group that inhabits the hyperarid desert of southern Peru
Fig. 3. Dorsal (A), ventral (B), and lateral (C) views of the head of holotype HP20CBT.
Fig 1 in A new lizard of the Liolaemus montanus group that inhabits the hyperarid desert of southern Peru
Fig 1. Phylogenetic tree obtained for the new species.
Fig. 1 in An endemic new species of Andean lizard of the genus Liolaemus from southern Peru (Iguania: Liolaemidae) and its phylogenetic position
Fig. 1. Phylogenetic tree obtained using Bayesian Methods (BM).
Figure 4 in Diversity in Australia's tropical savannas: An integrative taxonomic revision of agamid lizards from the genera Amphibolurus and Lophognathus (Lacertilia: Agamidae)
Figure 4. Distribution of study species included in this study, compiled from museum records.
Figure 9 in Diversity in Australia's tropical savannas: An integrative taxonomic revision of agamid lizards from the genera Amphibolurus and Lophognathus (Lacertilia: Agamidae)
Figure 9. Holotype of Lophognathus horneri sp. nov. (NTM R16472).
Fig.1 in Microhabitat selection of the Western green lizard Lacerta bilineata
Fig.1 - Location of study area. / Localizzazione dell'area di studio.
Fig. 4 in The Body Size, Age Structure And Growth Pattern Of The Endemic Balkan Mosor Rock Lizard (Dinarolacerta Mosorensis Kolombatović, 1886)
Fig. 4. The age distribution in subadult and adult Mosor rock lizards
Figure 1 in Habitat structure and their influence in lizard's presence
Figure 1. PCA of the vegetation structure of the three restingas; percentage of explanation of axis 1 = 21.36% and axis 2 = 14.93%. Litter_Out = extension of leaf litter outside bush (on bare sand); Litter_Veg = extension of leaf litter inside bushes or under some vegetation; Litter_D = average depth of leaf litter; Sand = extension of bare sand; Bush = extension of bushes; Bush_H = average height of bushes; Tree = extension of trees; Tree_H = average height of trees; Brom = extension of bromeliads; Brom_H = average height of bromeliads; Grass = extension of grass; Grass_H = average height of grass; Herb = extension of herbaceous; Herb_H = average height of herbaceous; Gur = extension of guriri; Gur_H = average height of guriri; D_Plant = extension of dried plants; D_Plant_H = average height of dried plants; Cactus = extension of cactus; Cactus_H = average height of cactus. Numbers inside the symbols correspond to the amount of individuals Glaucomastix littoralis sighted in each transect.
Fig. 2 in A New Locality of the Italian Wall Lizard Podarcis siculus (Rafinesque-Schmaltz, 1810) from Turkey
Fig. 2. Photo of the discovered specimen of Podarcis siculus hieroglyphicus. Photo: I. Mollov.
Data from: Environmental and anthropogenic factors mediating the functional connectivity of the mesquite lizard along the eastern Trans-Mexican Volcanic Belt
<p>Functional connectivity, the extent to which a landscape facilitates or impedes the dispersal of individuals across the landscape, is a key factor for the survival of species. Anthropogenic activities such as urbanization, agriculture, and roads, negatively impact functional connectivity of most species, particularly low-vagility species like lizards. Here, we examine how a landscape modified by anthropogenic activities affects the functional connectivity, at both broad and fine scales, of a widely distributed generalist lizard <em>Sceloporus grammicus</em> in the eastern Trans-Mexican Volcanic Belt, Mexico. We estimated for the first time the species genetic structure, gene flow, and functional connectivity in agricultural and forest zones using genomic data, a comprehensive landscape characterization, and novel methods including gravity models. Our results showed marked genetic differentiation across the study region but also that functional connectivity is maintained for tens of kilometers despite <em>S. grammicus</em> low vagility. Specifically, we found that substrate and air temperature facilitated connectivity over broad and fine scales, respectively, while agricultural cover, relative humidity, and slope were important for connectivity and gene flow. Contrastingly, forest cover and roads favored (broad-scale) and limited (fine-scale) connectivity, likely associated with movement facilitated by small forest patches and with thermoregulation. Altogether, these results support that <em>S. grammicus</em> alternates its thermoregulatory behavior depending on the distance traveled and the habitat environmental conditions, and that it can disperse through relatively modified landscapes, mainly using agricultural zones. The information obtained is crucial to understanding the response of lizards to current anthropogenic pressures and their potential to adapt.</p>
Data from: Sexual color ornamentation, microhabitat choice, and thermal physiology in the common wall lizard (Podarcis muralis)
<p>Common wall lizards (<em>Podarcis muralis</em>) in Italy show a striking variation in body coloration across the landscape, with highly exaggerated black and green colors in hot and dry climates and brown and white colors in cool and wet climates. Males are more intensely colored than females, and previous work has suggested that the maintenance of variation in coloration across the landscape reflects climatic effects on the strength of male–male competition, and through this sexual selection. However climatic effects on the intensity of male–male competition would need to be exceptionally strong to fully explain the geographic patterns of color variation. Thus, additional processes may contribute to the maintenance of color variation. Here we test the hypothesis that selection for green and black ornamentation in the context of male–male competition is opposed by selection against ornamentation because the genes involved in the regulation of coloration have pleiotropic effects on thermal physiology, such that ornamentation is selected against in cool climates. Field observations revealed no association between body coloration and microhabitat use or field active body temperatures. Consistent with these field data, lizards at the extreme ends of the phenotypic distribution for body coloration did not show any differences in critical minimum temperature, preferred body temperature, temperature‐dependent metabolic rate, or evaporative water loss when tested in the laboratory. Combined, these results provide no evidence that genes that underlie sexual ornamentation are selected against in cool climate because of pleiotropic effects on thermal biology.</p>
Concatenated SNP data: Integrative taxonomy of the lizards Cercosaura ocellata species complex (Reptilia: Gymnophthalmidae) based on morphological and genomic data
<p>Concatenated unliked SNP data in phylip format used in 'Integrative taxonomy of the lizards Cercosaura ocellata species complex (Reptilia: Gymnophthalmidae) based on morphological and genomic data' study.</p>
Raw genomic RadSeq data from: Integrative taxonomy of the lizards Cercosaura ocellata species complex (Reptilia: Gymnophthalmidae) based on morphological and genomic data
<p>Raw genomic RadSeq data from individuals used in 'Integrative taxonomy of the lizards Cercosaura ocellata species complex (Reptilia: Gymnophthalmidae) based on morphological and genomic data' study.</p>
Dataset The relative importance of body size and UV coloration in influencing male-male competition in a Lacertid lizard
<p>This is the dataset of the paper "The relative importance of body size and UV coloration in influencing male-male competition in a Lacertid lizard" published in Behavioral Ecology and Sociobiology by Names et al. (2019). It includes a metadata statement and five data spreadsheets.</p> <p><strong>Abstract of the paper</strong></p> <p>Communication via color signals is common in natural systems. Ultraviolet (UV)-blue patches located on the outer-ventral scales of some Lacertid lizards are thought to be involved in male-male competition. However, the mechanisms that maintain their honesty remain unknown. Here, we use the common wall lizard <em>Podarcis muralis</em> to<br> test whether the lateral UV-blue spots are conventional signals, the honesty of which is guaranteed by receiver-dependent costs, and discuss their potential role as an amplifier of body size. We first described the morphology and reflectance properties of lateral blue spots in common wall lizards and investigated how they influence male-<br> male competition. Spot size and number, UV chroma, and conspicuousness (calculated using vision models) were significantly greater in adult males relative to adult females and adult males relative to juveniles. Total spot area (and not spot number) of adult males was positively correlated with body size. We conducted staged competition encounters between focal males and smaller or larger rivals with control or manipulated spots. Spots were enlarged in small rivals and reduced in large rivals to disrupt the phenotypic correlation between spot area and body size. Aggressiveness and dominance were positively influenced by body size in control encounters. Spot manipulations resulted in greater submission and less aggressiveness in focal males. These results contradict the predictions associated with conventional signals and amplifiers, but suggest that spots contributed to opponent evaluation during short-distance encounters between competing males.</p>
Figure 1 in Using body condition index can be an unreliable indicator of fitness: a case of sand lizard Lacerta agilis Linnaeus, 1758 (Sauria: Lacertidae)
Figure 1. Correlation between lizards' body length and body mass in the 3 age groups.
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